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AWS BNi-6 (N99700) Filler Metal

AWS BNi-6 is a nickel-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BNi-6 is the AWS designation for this material. N99700 is the UNS number.

It has the lowest melting temperature among the nickel-based brazing fillers in the database.

The graph bars on the material properties cards below compare AWS BNi-6 to: nickel-based brazing fillers (top), all nickel alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

160 GPa 24 x 106 psi

Poisson's Ratio

0.31

Shear Modulus

62 GPa 9.0 x 106 psi

Tensile Strength: Ultimate (UTS)

450 MPa 65 x 103 psi

Thermal Properties

Brazing Temperature

930 to 1090 °C 1700 to 2000 °F

Latent Heat of Fusion

260 J/g

Melting Completion (Liquidus)

880 °C 1610 °F

Melting Onset (Solidus)

880 °C 1610 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Expansion

9.8 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

55 % relative

Density

8.2 g/cm3 510 lb/ft3

Embodied Carbon

9.4 kg CO2/kg material

Embodied Energy

130 MJ/kg 56 x 103 BTU/lb

Embodied Water

210 L/kg 25 gal/lb

Common Calculations

Stiffness to Weight: Axial

11 points

Stiffness to Weight: Bending

22 points

Strength to Weight: Axial

15 points

Strength to Weight: Bending

16 points

Thermal Shock Resistance

20 points

Alloy Composition

Nickel (Ni) 87.2 to 90
Phosphorus (P) 10 to 12
Cobalt (Co) 0 to 0.1
Carbon (C) 0 to 0.060
Aluminum (Al) 0 to 0.050
Titanium (Ti) 0 to 0.050
Zirconium (Zr) 0 to 0.050
Sulfur (S) 0 to 0.020
Selenium (Se) 0 to 0.0050
Residuals 0 to 0.5

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

AWS A5.8: Specification for Filler Metals for Brazing and Braze Welding